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基于多维二氧化钛/纤维素纳米晶体复合薄膜的柔性湿度传感器

Flexible Humidity Sensors Based on Multidimensional Titanium Dioxide/Cellulose Nanocrystals Composite Film.

作者信息

Tong Xin, Wang Hong, Ding Huiyang, Li Jing, Zhao Huifang, Lin Zhaoyun, Xi Hongxia, Zhang Xuejin

机构信息

Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China.

Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.

出版信息

Nanomaterials (Basel). 2022 Jun 8;12(12):1970. doi: 10.3390/nano12121970.

DOI:10.3390/nano12121970
PMID:35745308
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9230069/
Abstract

A humidity sensor is a crucial device in daily life; therefore, in the present study, a novel humidity sensor was designed to increase its specific surface area to improve its humid sensing capacity and conductivity. Titanium dioxide nanoparticles (TiNP) consisting of zero-dimensional nanospheres and one-dimensional nanotubes were prepared by anodic oxidation. Rod-shaped cellulose nanocrystals (CNCs) with average length and diameter of 60 nm and 800 nm, respectively, were obtained by enzymatic hydrolysis and high pressure homogenization. TiNP/CNC composite films exhibited superior hydrophilicity and large specific surface areas based on Fourier transform infrared spectroscopy and nitrogen adsorption-desorption results. The humidity sensing characteristics of sensors based on TiNP/CNC flexible composite films with varying contents of TiNP were investigated under a relative humidity range of 11-97%. The 6% TiNP/CNC-based humidity sensor exhibited high humidity response, rapid response/recovery speed, and high stability. Furthermore, the humidity sensing mechanism of TiNP/CNC composite films was analyzed based on the density functional theory. TiNP/CNC-based humidity sensors could be applied in flexible and wearable electronics.

摘要

湿度传感器是日常生活中的关键设备；因此，在本研究中，设计了一种新型湿度传感器，以增加其比表面积，提高其湿敏能力和导电性。通过阳极氧化制备了由零维纳米球和一维纳米管组成的二氧化钛纳米颗粒（TiNP）。通过酶水解和高压均质化获得了平均长度和直径分别为60nm和800nm的棒状纤维素纳米晶体（CNC）。基于傅里叶变换红外光谱和氮吸附-脱附结果，TiNP/CNC复合膜表现出优异的亲水性和大比表面积。在11-97%的相对湿度范围内，研究了基于不同TiNP含量的TiNP/CNC柔性复合膜的传感器的湿度传感特性。基于6%TiNP/CNC的湿度传感器表现出高湿度响应、快速响应/恢复速度和高稳定性。此外，基于密度泛函理论分析了TiNP/CNC复合膜的湿度传感机制。基于TiNP/CNC的湿度传感器可应用于柔性和可穿戴电子设备。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/36e5c6424b42/nanomaterials-12-01970-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/a9b353c63a96/nanomaterials-12-01970-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/da31f0a874bc/nanomaterials-12-01970-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/b926cac57064/nanomaterials-12-01970-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/7c6d0631400c/nanomaterials-12-01970-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/37926a0c69a4/nanomaterials-12-01970-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/4aedb59118ea/nanomaterials-12-01970-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/a29fc13f6d35/nanomaterials-12-01970-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/0ce549254f91/nanomaterials-12-01970-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/36e5c6424b42/nanomaterials-12-01970-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/a9b353c63a96/nanomaterials-12-01970-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/da31f0a874bc/nanomaterials-12-01970-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/b926cac57064/nanomaterials-12-01970-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/7c6d0631400c/nanomaterials-12-01970-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/37926a0c69a4/nanomaterials-12-01970-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/4aedb59118ea/nanomaterials-12-01970-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/a29fc13f6d35/nanomaterials-12-01970-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/0ce549254f91/nanomaterials-12-01970-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a0d8/9230069/36e5c6424b42/nanomaterials-12-01970-g009.jpg

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